摘要
利用专门模拟森林冠层反射率的INFORM模型,结合野外实测数据对该模型中的八个输入参数进行了敏感性分析和敏感参数的步长优化研究。结果表明:叶面积指数、冠层高度、平均冠幅和森林密度四个参数是敏感参数,叶面积指数、冠层高度、平均冠幅输入步长分别为0.66、1和0.555 m,森林密度为244~1244棵·hm^-2时,以100棵·hm^-2为输入步长;为1244~5244棵·hm^-2时,以400棵·hm^-2为输入步长。这为减轻模型计算量、提高运行效率、保证模拟结果的精度提供了一定的技术参考。
In this paper,the INFORM model,which specially simulated forest canopy reflectance,was used to analyze the sensitivity of eight input parameters and optimize the step size of the sensitive parameters.The results showed that the LAI,canopy height,mean crown breadth and forest density were sensitive parameters.The LAI,canopy height,mean crown were input at the step of 0.66 m,1 m and 0.555 m,respectively.The forest density were input at the step of 100 trees·hm^-2 within the scope of 244~1244 trees·hm^-2,while at the step of 400 trees·hm^-2 within the scope of 1244~5244 trees·hm^-2.The research can simplify the model calculation,improve operational efficiency and ensure the accuracy of the simulation results.
作者
苑惠丽
李吉英
YUAN Hui-li;LI Ji-ying(Jinling Institute of Technology, Nanjing 211169, China;Binzhou University, Binzhou 256603, China)
出处
《金陵科技学院学报》
2020年第2期78-83,共6页
Journal of Jinling Institute of Technology
基金
江苏省自然科学青年基金项目(BK20170117)。